According to a the left side of the Twittersphere, a Mitt Romney win in November will be catastrophic. And black Americans will suffer the most:

https://twitter.com/Mr_Popular305/status/243906787223416832

https://twitter.com/BeatingHerUnder/status/243913253649002496

Some Twitter users said that they will no longer stand for the Pledge of Allegiance if Obama is not re-elected:

A few even threatened violence:

https://twitter.com/JosephG_/status/243916047449722880

https://twitter.com/PamDaddy24/status/243909666084638721